EP0169760A1 - Sicherheitsvorrichtung für ein Tief arbeitendes landwirtschaftliches Gerät - Google Patents

Sicherheitsvorrichtung für ein Tief arbeitendes landwirtschaftliches Gerät Download PDF

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Publication number
EP0169760A1
EP0169760A1 EP85401255A EP85401255A EP0169760A1 EP 0169760 A1 EP0169760 A1 EP 0169760A1 EP 85401255 A EP85401255 A EP 85401255A EP 85401255 A EP85401255 A EP 85401255A EP 0169760 A1 EP0169760 A1 EP 0169760A1
Authority
EP
European Patent Office
Prior art keywords
spring
axis
working member
energy accumulator
safety means
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP85401255A
Other languages
English (en)
French (fr)
Inventor
Jean-Pierre Boudin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kongskilde Koncernselskab AS
Original Assignee
Kongskilde Koncernselskab AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kongskilde Koncernselskab AS filed Critical Kongskilde Koncernselskab AS
Publication of EP0169760A1 publication Critical patent/EP0169760A1/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B61/00—Devices for, or parts of, agricultural machines or implements for preventing overstrain
    • A01B61/04—Devices for, or parts of, agricultural machines or implements for preventing overstrain of the connection between tools and carrier beam or frame
    • A01B61/044—Devices for, or parts of, agricultural machines or implements for preventing overstrain of the connection between tools and carrier beam or frame the connection enabling a yielding pivoting movement around a substantially horizontal and transverse axis
    • A01B61/046—Devices for, or parts of, agricultural machines or implements for preventing overstrain of the connection between tools and carrier beam or frame the connection enabling a yielding pivoting movement around a substantially horizontal and transverse axis the device including an energy accumulator for restoring the tool to its working position

Definitions

  • the present invention relates to an improved safety device for agricultural tools working at great depths, that is to say at a depth greater than that of plowing.
  • a device can in particular be mounted on the teeth of a subsoiler.
  • these safety devices not only ensuring erasure, but also protecting against the risks of breakage, are constituted by pins which yield as soon as a certain force is exerted on it, thus allowing the erasure of the tool or the part of the tool having encountered the obstacle.
  • the main drawback of such devices is that they require the intervention of the farmer to restore the tool to working condition.
  • One of the aims of the present invention is therefore to provide a safety device for agricultural tools with teeth or plowshares, working at great depth.
  • Another object of the invention is to provide such a safety device which allows the agricultural tool to always work at a constant depth.
  • An additional object of the invention is to provide a device of this type which allows rapid replacement of the working member after it has been erased.
  • An object of the invention is a safety device which is simple and reliable.
  • an improved safety device for agricultural tools working at great depth which comprises a chassis composed of longitudinal and transverse beams, at least one working member such as tooth or ploughshare, being fixed on a transverse beam by means of a support.
  • the improved safety device comprises, on the one hand, safety means mounted on this chassis and connected to the working member and, on the other hand, an energy accumulator cooperating with these safety means .
  • the support comprises rearward an upper branch and a lower branch on either side of which are arranged two flanges between which is mounted a working member kept in rotation by an axis and resting, in the working or rest position, on a plate secured to these two flanges
  • the safety means comprise a connecting rod which is mounted in the vicinity of one of its ends on the upper branch of the support rotating around an axis and the other end of which comprises a roller pressing on this working member and which can rotate about an axis, and at least one rod bearing on this axis, which can slide in an axis located at the front part of the support and around from which a spring is mounted, the angle a formed by the plane comprising the axes and that of the roller bearing on the working member being less than 90 °, when the t-working member rests on the flat.
  • this angle a is less than (90- ⁇ ), 0 corresponding to the angle necessary to overcome friction.
  • the end of the rod which slides in the axis is threaded and is provided with a nut making it possible to adjust the preload of the spring.
  • the roller rests on the working member by means of a plate integral with the latter.
  • this roller and this plate are made of the same material.
  • the safety device comprises two rods each provided with a spring and located on either side of the support.
  • the energy accumulator is constituted by a spring located inside the spring of the safety means and is of length less than this.
  • the energy accumulator comprises at least one bar bearing on the same axis as the rod of the safety means, which can slide in an axis located on the upper arm and around which is mounted a spring whose length is less than the distance between these two axes.
  • the angle formed by the plane comprising the axes of the safety means and that comprising the axes of the energy accumulator is substantially equal to half of the angle a.
  • the support consists of a lever arm which is articulated at one of its ends on a transverse beam of the chassis and the other end of which is integral with the working member, the safety means being constituted by a leaf spring bearing on this transverse beam and on the end of the lever arm provided with the working member.
  • the energy accumulator comprises a rod perpendicular to this lever arm and integral with it, passing through the leaf spring and around which is wound beyond the leaf spring a spring capable of bearing, on the one hand, on the leaf spring and, on the other hand, on a stop with which this rod is provided, the length of this spring at rest being less than the distance between this stop and this leaf spring.
  • this rod is located substantially in the middle of the lever arm.
  • the energy accumulator consists of a mass fixed on this transverse beam and advancing above the lever arm, against which the leaf spring abuts when it deforms -this is requested.
  • a subsoiler an agricultural implement with a tooth working at a depth greater than that of a ploughshare, like any tooth apparatus, includes a frame composed of longitudinal and transverse beams or oblique forming a V. The teeth are fixed on a transverse beam.
  • a support 2 comprising rearwardly an upper branch 3 on either side of which are arranged two flanges 5 secured to their lower part of a sole 4. Between these two flanges 5 is disposed a tooth 6 held, at one of its ends, in rotation by an axis 7 and resting, in the working or rest position, on a plate 8 welded between the two flanges 5.
  • This tooth 6 is a traditional tooth for a subsoiler: it is provided, at its free end, with a ploughshare 9.
  • a U-shaped part 11 On the upper arm 3 of the support 2 is mounted via a pin 10 a U-shaped part 11, the opening of the U being turned downwards.
  • the axis 10 is located near the bottom of this part 11 which is hereinafter called the connecting rod.
  • a roller 12 Between the two branches of the connecting rod 11 and in the vicinity of the free ends of the branches of the U is disposed a roller 12 free to rotate about an axis 13.
  • This roller 12 rests on a plate 14 made of the same material as it and arranged on tooth 6.
  • the safety means according to the present invention comprise, in addition to the connecting rod 11 and the roller 12, two rods 15 and 16 which are located on either side of the support 2, one end of which is integral in rotation with the axis 13 and the other end of which slides in an axis 17 located at the foremost part of the support 2 and above the transverse beam 1.
  • the angle formed by the plane containing the axes 10 and 13 and the plate 14 on which the roller 12 is supported must be less than 90 ° and preferably even at (90 ° - ⁇ ), S being the angle necessary to overcome friction. This angle ⁇ is at least equal to 5 °.
  • the safety means also include springs 18 and 19 mounted respectively on the rods 15 and 16. Thanks to a nut 20 and the fact that the free end of the rod 15 is threaded, the preload of the spring 18 can be adjusted. the same is true for the spring 19. The preload of the two springs 18 and 19 is substantially the same.
  • the improved safety device in addition to the safety means described above, comprises an energy accumulator comprising two bars 23 and 24 which bear on the same axis 13 as the rods 15, 16 of the safety means which can slide in an axis 25 located on the upper arm 3 and around each of which are mounted springs 26 and 27 respectively.
  • the length of these springs 26 and 27 is less than the distance between the two axes 13 and 25.
  • the energy accumulator therefore consists of two sets spring bars located on either side of the upper arm 3.
  • the angle formed by the plane comprising the two axes 13 and 17 of the safety means and that comprising the two axes 13 and 5 of the energy accumulator is preferably substantially equal to half of the angle a.
  • each spring of the energy accumulator is arranged inside the corresponding spring laying security means but its length is less than that thereof.
  • the tooth 6 is driven into the ground 21, the springs 18 and 19 of the safety means are at their maximum length, the springs 26 and 27 of the energy accumulator are in no way stressed, and the angle a is less than (90 ° -s).
  • the rods 15 and 16 of the safety means and the bars 23 and 24 of the energy accumulator slide respectively in the axes 17 and 25. Under these conditions the point of the ploughshare 9 can freely describe the outline of the obstacle 22, the tooth 6 can thus be retracted or erased.
  • the reclosing of tooth 6 comprises two phases: a first in which the springs of the safety means and those of the energy accumulator act simultaneously, and a second in which only the springs of the safety means act since those of the energy accumulator have a length less than the stroke of their rod support.
  • Tooth 6 therefore resumes its position as soon as the obstacle 22 is crossed: the inertia stored in the springs is so great that the replacement of the entire system, or resetting, is instantaneous.
  • the curve of the forces at the end of the tooth 6 is represented: the ordinates indicate the forces (F in daN) at the end of the tooth, and the abscissae the height (H in mm) of the tooth rising when the improved safety device is triggered.
  • the ordinate S corresponds to the minimum effort causing the system to trip.
  • Curve C 1 is that described when only the safety means act.
  • Curve C 2 is that described when the agricultural tool is provided with the device according to the invention. It can be noted that the reclosing of the tooth is much faster in the latter case thanks to the additional energy stored in the energy accumulator and released completely at the start of the reclosing.
  • Another advantage of such a device is that it allows very great efforts at the level of the ploughshare 9 without risking damaging the tooth 6.
  • the force applied to the roller 12 directed perpendicular to the plate 14 is broken down into a force exerted in the plane of the axes 13 and 17 and a force exerted in the plane of the axes 10 and 13.
  • the improved safety device according to the present invention may comprise only a rod 15 and a spring 18 as well as a desk 23 and a spring 26.
  • the upper part of the support 2 can in this case for example consist of two flanges between which would be arranged the safety means and the energy accumulator.
  • FIG. 5 to 8 Another embodiment of the present invention is shown in Figures 5 to 8: in this case, the tooth 6 of the subsoiler is secured to the end of a lever arm 31 whose other end is articulated around 'an axis 32 located on the transverse beam 1.
  • the safety means consist of a leaf spring 33, one end of which is fixed to the transverse beam 1 and the other to the lever arm 31 at the level of the fixing of the tooth 6.
  • the energy accumulator in this exemplary embodiment comprises a rod 34 disposed perpendicularly to the lever arm 31 of which it is integral, and passing through the leaf spring 33, and around which is mounted a spring 35 resting on the leaf spring 33.
  • the rod 34 comprises a stop 36: the distance between this stop and the leaf spring 33 is greater than the length of the spring 35 at rest.
  • this type of subsoiler one can provide, as a variant, another type of energy accumulator.
  • This consists of a stop 37 arranged on the transverse beam 1 and which is slightly overhanging above the leaf spring 33.
  • a safety device no longer requires the intervention of man for its rearming and allows the agricultural tool with a tooth comprising it to work at a constant depth: what happens at the level of a tooth n has no influence on the other teeth of this tool.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Soil Working Implements (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
EP85401255A 1984-06-28 1985-06-24 Sicherheitsvorrichtung für ein Tief arbeitendes landwirtschaftliches Gerät Withdrawn EP0169760A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8410227A FR2566618B1 (fr) 1984-06-28 1984-06-28 Dispositif perfectionne de surete pour outil agricole travaillant a grande profondeur
FR8410227 1984-06-28

Publications (1)

Publication Number Publication Date
EP0169760A1 true EP0169760A1 (de) 1986-01-29

Family

ID=9305565

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85401255A Withdrawn EP0169760A1 (de) 1984-06-28 1985-06-24 Sicherheitsvorrichtung für ein Tief arbeitendes landwirtschaftliches Gerät

Country Status (5)

Country Link
EP (1) EP0169760A1 (de)
DK (1) DK292185A (de)
ES (1) ES8608774A1 (de)
FR (1) FR2566618B1 (de)
ZA (1) ZA854930B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2249702B (en) * 1990-11-15 1994-09-21 Kverneland Klepp As Reversible plough with upwardly displaceable ploughshare
DE19541581A1 (de) * 1995-01-23 1996-07-25 Eberhardt Maschinenfabrik Gmbh Vorrichtung zum Schutz der Arbeitswerkzeuge von Bodenbearbeitungsgeräten gegen Überlastung
EP4706355A1 (de) * 2024-08-13 2026-03-11 Lemken GmbH & Co KG Landwirtschaftliche bodenbearbeitungsvorrichtung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2584613C1 (ru) * 2014-11-25 2016-05-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального лбразования Донской государственный аграрный университет Подвеска рабочих органов культиватора
RU2672604C1 (ru) * 2017-06-27 2018-11-16 Федеральное государственное бюджетное образовательное учреждение высшего образования "Горский государственный аграрный университет" Секция плуга для каменистых почв с самоустанавливающим шарнирным звеном

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE329098C (de) * 1918-11-14 1920-11-19 Scheffeldt G M B H Maschf Pflugscharanordnung bei Motor- und anderen Pfluegen
US3642074A (en) * 1965-09-13 1972-02-15 Cletus J Geurts Earth-working implement
FR2389311A1 (de) * 1977-05-04 1978-12-01 Lely Nv C Van Der
US4249615A (en) * 1979-04-30 1981-02-10 Friggstad Manufacturing Ltd. Two-stage trip release shank assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE329098C (de) * 1918-11-14 1920-11-19 Scheffeldt G M B H Maschf Pflugscharanordnung bei Motor- und anderen Pfluegen
US3642074A (en) * 1965-09-13 1972-02-15 Cletus J Geurts Earth-working implement
FR2389311A1 (de) * 1977-05-04 1978-12-01 Lely Nv C Van Der
US4249615A (en) * 1979-04-30 1981-02-10 Friggstad Manufacturing Ltd. Two-stage trip release shank assembly

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2249702B (en) * 1990-11-15 1994-09-21 Kverneland Klepp As Reversible plough with upwardly displaceable ploughshare
DE19541581A1 (de) * 1995-01-23 1996-07-25 Eberhardt Maschinenfabrik Gmbh Vorrichtung zum Schutz der Arbeitswerkzeuge von Bodenbearbeitungsgeräten gegen Überlastung
EP4706355A1 (de) * 2024-08-13 2026-03-11 Lemken GmbH & Co KG Landwirtschaftliche bodenbearbeitungsvorrichtung

Also Published As

Publication number Publication date
FR2566618B1 (fr) 1987-04-24
DK292185A (da) 1985-12-29
DK292185D0 (da) 1985-06-27
ZA854930B (en) 1986-02-26
FR2566618A1 (fr) 1986-01-03
ES544626A0 (es) 1986-07-16
ES8608774A1 (es) 1986-07-16

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Inventor name: BOUDIN, JEAN-PIERRE